[1] RFC 7382 - Template for a Certification Practice Statement (CPS) for the Resource PKI (RPKI) (2018-08-19 16:43:46 +09:00) https://tools.ietf.org/html/rfc7382

[2] RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile (2018-08-26 16:15:03 +09:00) https://tools.ietf.org/html/rfc5280#section-4.2.1.4